Wheels that make electricity. What does it make when it's calm? Don't be a pessimist. That's what I mean. Wasting your money on sheer nonsense. Inflation. Very soon money will be worthless.
 Charlie Chaplin, Monsieur Verdoux (1947). copy citation

Context

“I'm saving you from squandering your money on these enterprises. - Worthless stocks. - They're not. All of them. Well, I still have faith in the Pacific Ocean Power Company. - What's that? - I've told you about it. It's a machine that floats on waves. Wheels that make electricity. What does it make when it's calm? Don't be a pessimist. That's what I mean. Wasting your money on sheer nonsense. Inflation. Very soon money will be worthless. - What have you done? - What do you want to do? Invest wisely, safely at least. Land, houses or jewelry. I knew a friend who has some antique - - That's funny. - What? - Just what I did. - What? - I bought jewelry, diamonds.” source